package face;

public class Amplifier {
    public void on() {
        System.out.println("打开功放");
    }

    public void setDvd(DvdPlayer dvd) {
        System.out.println("设置dvd:" + dvd.toString());
    }

    public void setSurroundSound() {
        System.out.println("调整环绕立体声模式");
    }

    public void setVolume(int i) {
        System.out.println("音量调到" + i);
    }

    public void off() {
        System.out.println("关闭功放");
    }
}
